Bicycle exerciser



FIG. 1 is a left side elevational view of a bicycle exerciser showing mynew design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear perspective view thereof; and

FIG. 5 is a another rear perspective view thereof.

The ornamental design for bicycle exerciser, substantially as shown anddescribed.